本文件规定了用强制通风炉测定聚丙烯和丙烯共聚物模压试样在空气中加热加速老化的方法。该方法是一种估算丙烯塑料制品使用寿命的尝试。当环境条件不同时，用这种方法测定的稳定性与材料的适用性没有直接关系。注:规定的热水平被认为足够严重，足以在合理的时间内导致商业级热稳定丙烯塑料失效。如果需要，可以采用较低的温度来评估热稳定性较低的丙烯塑料的性能。

This document specifies a method for the determination of the resistance of moulded test specimens of polypropylene and propylene-copolymers to accelerated ageing by heat in the presence of air using a forced draught oven. The method represents an attempt to estimate the service life of parts fabricated from propylene plastics. The stability determined by this method is not directly related to the suitability of the material for use when different environmental conditions prevail. NOTE The specified thermal levels are considered sufficiently severe to cause failure of commercial grades of heat-stable propylene plastics within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of propylene plastics with lower heat stabilities.